<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <title></title>
    <script>
    /*let str='abc';
    let str="abc";*/

    let a=12;

    let str=`a${a}bc`;

    alert(str);
    </script>
  </head>
  <body>

  </body>
</html>
